01-18-2015 11:51 AM - edited 01-18-2015 12:19 PM
I just updated the intel graphics drivers to the latest (4080) version recommended by the intel helper utility. Now, half of the keys on the keyboard don't work. Reverting to the version bundled on the lenovo support site fixes the issue.
Why does the graphics driver affect the keyboard, and how can I fix this so I can get on the latest drivers?
The older drivers have severe problems with high CPU usage:
That's keeping my fan spinning all the time. I want to upgrade to fix these issues, but the upgrade then blows up the keyboard. W TF!
Solved! Go to Solution.
01-18-2015 04:23 PM
Which driver gave you the issue?
I'm currently running 10.18.10.3960 without any CPU usage issues. I found Harmony was causing higher CPU loads.
01-18-2015 08:02 PM
I believe 3960 is the one with high CPU issues. It only presents in a multiple user situation, where you're switching users, and/or if you have a non-admin user account. The igfxEM.exe spins up for each user account, taking an entire CPU core each.
Can you repro my keyboard issue with half of the keys not working on the latest 4080 drivers from 12 January?
The only way I was able to resolve both that and the CPU issue was by reverting to the original 3871 drivers. Of course, that version has other issues, like the mouse pointer dissappearing eventually after clicking around and opening the start menu a few times.
01-18-2015 08:21 PM
I've just revved up to 4080, and have no issues as of yet.
The Intel Update Utility still seems to recommend 3960 for us, probably due to the young age of Broadwell.
As you can probably tell, I am having no issues with typing on 4080, so I am unable to reproduce your issue. Keep in mind, my machine is pretty much 100% vanilla (I haven't even had the opportunity to load up ESET or MalwareBytes yet!).
The keyboard is usually a part of the chipset rather than the GPU bus. Just to be safe, can you try re-installing the chipset:
And then re-install 4080 from the below URL:
Let me know if anything changes.
01-18-2015 09:45 PM
Reinstalling the stock chipset drivers, and then reapplying the new 4080 drivers seems to have worked. I had previously used the generic Intel chipset driver update, so maybe there was a conflict between that and 4080 somewhere, causing the left side of the keyboard to not work.
Everything's working great now! Thanks for all your help here.